The first two weeks of enforcement in 2017 produced 1,411 warnings, according to the Changing Driver Behavior Study, which the city released on Wednesday, Jan. 9. Violations included driving close to pedestrians, swerving around them or not stopping, causing pedestrians to step back.

Each enforcement period was two weeks and conducted four times. After the first period -- when police only handed out warnings -- officers began issuing tickets to drivers who violated Ann Arbor’s pedestrian law, which states if a pedestrian is standing “at the curb, curb line or ramp leading to a crosswalk” or within the crosswalk, a driver must stop and yield to the right-of-way to the pedestrian.

Drivers who do not yield face tickets with $135 fine.

Police issued 316 tickets and 56 warnings during the second phase in August 2017. They wrote 227 tickets and issued 64 warnings in October 2017, 163 tickets and 51 warnings in November 2017 and 138 tickets and 76 warnings in June 2018, the final wave, according to the study.

The total came to 1,658 warnings and 844 tickets for the entire experiment.

Numbers decreased as the project progressed due to drivers understanding more about Ann Arbor’s crosswalk law and being cognizant of their surroundings, Sgt. Bill Clock said.

“I think it’s the combined effort of the engineering of the crosswalks being improved all the time and the public education the city has done,” Clock said.

Stopping for pedestrians increased from an average of of 28.5 percent to 65.2 percent at enforced sites, according to the study, and from 34.2 percent to 53 percent at sites that did not have added enforcement.

“Ensuring the safety of pedestrians by changing driver behavior requires a holistic approach that includes enforcement, engineering, education, evaluation and encouragement -- also known as the 5Es,” Raymond Hess, city transportation manager, said in a news release.

Each zone had between four and six officers patrolling, which included a plainclothes officer as a walker, Clock said. Several officers worked overtime for the driver safety project.

AAPD currently does not plan to conduct another round of crosswalk enforcement.